CN104692745B - A kind of high-strength high abrasion cement-based material and preparation method thereof - Google Patents
A kind of high-strength high abrasion cement-based material and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of high-strength high abrasion cement-based material and preparation method thereof, the raw material composition of described high-strength high abrasion cement-based material comprises by weight: silicate cement 1 part, highly active mineral admixture 0.15 ~ 0.25 part, ultra-fine wear-resisting adulterant 0.2 ~ 0.3 part, wear-resisting powder 0.3 ~ 0.4 part, abrasive aggregates 1.0 ~ 1.5 parts, high-performance water reducing agent 0.01 ~ 0.02 part, steel fiber 0.15 ~ 0.25 part, 0.22 ~ 0.28 part, water.The wear resistance of cement-based material provided by the invention is greatly improved, and resistance to compression simultaneously and bending strength also have larger lifting.
Description
Technical field
The present invention relates to a kind of high-strength high abrasion cement-based material and preparation method thereof.
Background technology
In the equipment such as pipeline, tornadotron, silo, hopper for powder or slurry pipeline transport and facility in the fields such as electric power, metallurgy, cement, petrochemical complex, mine, the wearing and tearing caused by medium transport and souring, the top layer of these industrial equipmentss and facility and medium contact is destroyed, finally cause equipment failure, work-ing life shortens greatly, causes larger financial loss.Traditional ferrous materials is corroded, wear and tear after, rate of decay is fast, and stopping production repair and replacement are frequent.General cement-base wear-resistant material, although price is low, easy construction, wear no resistance, aggregate easily comes off, thus causes high-abrasive material to lose efficacy; And the sizing such as wear-resistant ceramic, cast stone, calendering micro-crystal plate wearable plate, fragility are larger, impact resistance is poor, and be not suitable for manufacturing large-scale and special-shaped component, usually need by bonding with the connection of equipment and facility, thus make this class high-abrasive material, the destruction that is hit easily produced because fragility is high, the destruction come off because bonding force is weak, therefore, needs the high-strength high abrasion resisting material developing cement based, to adapt to China's industrial expansion, reduce the wear-out failure of various equipment and facility.
About the exploitation of high abrasion resisting material, Chinese patent (CN201310004505.0) discloses a kind of complex abrasion-proof lining material and preparation method of impervious freeze-thaw-, this invention adopts aluminate cement and epoxy resin as consolidating material, adds the complex abrasion-proof lining material that compound volcano ash, chromic oxide micro mist, silicon carbide fine powder and superpolymer fortifying fibre obtain a kind of high impervious freeze-thaw-.Chinese patent (CN201110432766.3) discloses a kind of High-strength organic abrasive, and this invention replaces cement as consolidating material using epoxy resin, makes wear-resistant material and base adhesive more firm, shock resistance raising; But, because above two patents are all by adopting organic epoxy resin to obtain higher intensity, cohesive force and impervious freezing and thawing performance, therefore, its resistance to elevated temperatures (if temperature is higher than 200 DEG C) is poor, and can not adapt to such as Cement industry, power station and iron and steel enterprise etc. has the equipment requirements of comparatively high temps requirement.Huang Zhengyu, Liu Qiang adopt uniform ultra-fine dense system (DensifiedSysternyContaininghomgengouslyarrangedultra-fin eParticles, DSP), utilize high pozzolanic activity and the filling effect of silicon ash, select high abrasion aggregate, prepare high-strength high abrasion resisting material, had good wearability.The preparation method of High Strength Cement-Based Materials is adopted to prepare the wear resistance that high abrasion resisting material can increase substantially cement-base wear-resistant material, but owing to not carrying out modification for the wear resistance of the cement matrix playing cementation, its wear resisting property also fails to reach best, still require further improvement, to reach higher wear resistance.
Summary of the invention
The technical problem that the present invention solves is, improves intensity and the wear resistance of cement-based material further.
Technical scheme of the present invention is, a kind of high-strength high abrasion cement-based material is provided, its raw material composition comprises by weight: silicate cement 1 part, highly active mineral admixture 0.15 ~ 0.25 part, ultra-fine wear-resisting adulterant 0.2 ~ 0.3 part, wear-resisting powder 0.3 ~ 0.4 part, abrasive aggregates 1.0 ~ 1.5 parts, high-performance water reducing agent 0.01 ~ 0.02 part, steel fiber 0.15 ~ 0.25 part, 0.22 ~ 0.28 part, water; Described highly active mineral admixture is silicon ash or burns metakaolin; Described ultra-fine wear-resisting adulterant to be median size the be ground steel slag of 1 ~ 3 μm; Described wear-resisting powder and abrasive aggregates are one or more mixing in sintered bauxite, black silicon carbide or silicon nitride, and the median size of wear-resisting powder is 30 ~ 45 μm, and the median size of abrasive aggregates is 0.16 ~ 2mm.
Further, described silicate cement is 42.5 grades and above silicate cement.
Further, described silicon ash is SiO
2content is greater than 90%, specific surface area is greater than 20m
2the condensation silicon ash of/g.
Further, SiO in described burning metakaolin
2and Al
2o
3total content be no less than 92%, burning the median size of metakaolin is 1 ~ 3mm.
Further, Al in described sintered aluminium vanadine
2o
3content is greater than 90%; In black silicon carbide, SiC content is greater than 98%; α-Si in silicon nitride
3n
4content be greater than 93%.
Further, in described abrasive aggregates, the mass ratio of different-grain diameter scope abrasive aggregates is (particle diameter 0.16 ~ 0.25mm) ︰ (particle diameter 0.25 ~ 0.50mm) ︰ (particle diameter 0.5 ~ 1.0mm) ︰ (particle diameter 1.0 ~ 2.0mm)=1 ︰ 1 ︰ 1 ︰ 4 or 1 ︰ 1 ︰ 2 ︰ 3.
Further, the diameter of described steel fiber is 0.12 ~ 0.2mm, and length-to-diameter ratio is 40 ~ 60, and tensile strength is not less than 2000MPa.
Further, described high-performance water reducing agent is the non-air-entraining water-reducing agent that water-reducing rate is greater than 35%.
The present invention further provides the preparation method of high-strength high abrasion cement-based material, it comprises the following steps:
(1) take silicate cement 1 part by weight, highly active mineral admixture 0.15 ~ 0.25 part, ultra-fine wear-resisting adulterant 0.2 ~ 0.3 part, high-performance water reducing agent 0.01 ~ 0.02 part, send into ball mill mix grinding, make wear-resisting gelling material;
(2) take 1.36 ~ 1.58 parts of described wear-resisting gelling material by weight, wear-resisting powder 0.3 ~ 0.4 part, abrasive aggregates 1.0 ~ 1.5 parts, mix and blend, makes wear-resisting dry blend;
(3) 2.66 ~ 3.48 parts of described wear-resisting dry blends are taken by weight, send into stirrer, add 0.22 ~ 0.28 part of water to stir, after being stirred to compound fluidisation, stir while slowly add 0.15 ~ 0.25 part of steel fiber again, pour into after stirring in mould, after maintenance, namely obtain high-strength high abrasion cement-based material.
For the high thermal resistance solved containing the high-abrasive material of the organic adhesion agents such as epoxy resin is poor, ultimate compression strength and the folding strength of wear-resistant ceramic are lower, shock resistance is poor, the problem that the wear resistance of common cement-base high-abrasive material is not high and intensity is low, the invention provides a kind of high-strength high abrasion cement-based material and preparation method thereof.
Engineering practice and research show, the wear resistance of cement-base wear-resistant material is except depending mainly on abrasive aggregates, also closely related with the performance of the Behavior of Hardened Cement Paste playing adhesive action.Therefore, for improving the wear resistance of cement-base wear-resistant material further, needing the composition improving Behavior of Hardened Cement Paste further, improving the wear resistance of Behavior of Hardened Cement Paste.Because petrifying water mudstone is made up of the hydrated product of cement and unhydrated cement granules, therefore, the wear resistance of petrifying water mudstone can from hydrated product and unhydrated cement granules two aspect modification.In the high-strength high abrasion resisting material of cement based, mix ultra-fine silicon ash or burn metakaolin, due to closestpacking effect and volcano ash effect, the density of hydrated product can be increased, reduce the content of calcium hydroxide, increase the content of hydrated calcium silicate, improve the wear resistance of hydrated product; As preferably, the consumption of highly active mineral admixture is 0.15 ~ 0.25 part, when volume is less, and modifying function is not obvious; Volume is excessive, and intensity can decline.For improving the wear resistance of hydrated product part further, Ultrafine Grinding slag is added as wear-resisting adulterant in the high-strength high abrasion resisting material of cement based, because Ultrafine Grinding slag has certain activity, can be combined well with other hydrated products, simultaneously, slag itself has good wear resistance, thus can improve the wear resistance of hydrated product in Behavior of Hardened Cement Paste.As preferably, the median size of Ultrafine Grinding slag is 1 ~ 3mm, and particle diameter is meticulous, grinding difficulty, uneconomical; Particle diameter is excessively thick, then, when volume is larger, will cause strength degradation, through test, the consumption of Ultrafine Grinding slag with 0.2 ~ 0.3 part for the best.For improving the wear resistance of non-aquation part in Behavior of Hardened Cement Paste, mix the wear-resisting powder of part further, the unhydrated cement granules of Substitute For Partial, according to the requirement of wear resistance, the wear-resisting powder mixed has sintered bauxite powder, black silicon carbide powder or silicon nitride powder, through optimizing, the median size of powder is 30 ~ 45 μm, and consumption is 0.30 ~ 0.40 part; Particle diameter is excessively thick, or consumption too low (being less than 0.30) is then to the improvement DeGrain of petrifying water mudstone wear resistance, particle diameter is meticulous or consumption is excessive (being greater than 0.4 part), then can reduce the mechanical properties such as the intensity of the high-strength high abrasion resisting material of cement based.The wear resistance of abrasive aggregates to cement-base wear-resistant material has the greatest impact, according to the requirement of wear resistance, sintered bauxite, black silicon carbide and silicon nitride aggregate can be selected, through preferred, consumption is 1 ~ 1.5 part, consumption is less than 1 part, and the wear resistance of the high-strength high abrasion resisting material of cement based can decline, and the intensity that consumption is greater than the high-strength high abrasion resisting material of 1.5 cement based can decline; The grating of abrasive aggregates also has impact to the intensity of the high-strength high abrasion resisting material of cement based and wear resistance, through test, grain composition composition (different-grain diameter granular mass ratio) is: (particle diameter 0.16 ~ 0.25mm): (particle diameter 0.25:0.50mm): (particle diameter 0.5 ~ 1.0mm): the performance of (particle diameter 1.0 ~ 2.0mm)=1:1:1:4 or 1:1:2:3 is better.For improving the intensity of the high-strength high abrasion resisting material of cement based, reduce water-cement ratio, the water-reducing rate of water reducer should be greater than 35%, to ensure, under very low water-cement ratio, having good processability.The toughness had to make the high-strength high abrasion resisting material of cement based and shock resistance, need mix high-strength steel fiber wherein, through preferred, the tensile strength of high-strength steel fiber need be greater than 2000MPa fiber, diameter is 0.12 ~ 0.2mm, and length-to-diameter ratio is 40 ~ 60, and consumption is 0.15 ~ 0.25 part; The tensile strength of steel fiber is lower than 2000MPa, the activeness and quietness effect of fiber can decline, Fibre diameter excessively thick (being greater than 0.2mm) or length-to-diameter ratio excessive (being greater than 60), the number of fiber in high-abrasive material will reduce, and the homogeneity of material is not good.Fiber consumption is less than 0.15 part, the DeGrain of fiber reinforcement technology and raising shock resistance; Fiber consumption is greater than 0.25 part, the easy conglomeration of fiber, affects processability and the homogeneity of the high-strength high abrasion resisting material of cement based.
The wear resistance of cement-based material provided by the invention is greatly improved, and resistance to compression simultaneously and bending strength also have larger lifting.
Embodiment
Below in conjunction with embodiment and comparative example, the present invention is illustrated.
Embodiment 1
Take each starting material: silicate cement: 50kg, silicon ash 10kg, Ultrafine Grinding slag: 12.5kg, sintered bauxite powder: 15kg, sintered aluminium vanadine aggregate: 60kg, high-performance water reducing agent: 0.75kg, high-strength steel fiber: 10kg.Silicate cement, silicon ash, Ultrafine Grinding slag, high-performance water reducing agent are sent into ball mill mix grinding 20 minutes, makes wear-resisting gelling material, draw off for subsequent use; The wear-resisting gelling material made all is sent into mixed model machine at a high speed, and add sintered bauxite powder, sintered bauxite aggregate mix and blend 15 minutes, make wear-resisting dry blend, draw off for subsequent use; Again the wear-resisting dry blend made all is sent into stirrer, add 12kg water to stir, after being stirred to compound fluidisation, stir while slowly add high-strength steel fiber, until after all high-strength steel fiber is evenly distributed in compound, stops stirring, the compound mixed is poured in mould, after maintenance, make required product.
Described silicate cement is PII42.5 level silicate cement, C
3a content is 5.8%, C
4aF is 13%, and mixing material is granulated blast-furnace slag; Described silicon ash is greater than 20m for specific surface area
2/ g, SiO
2the condensation silicon ash that content is greater than 90%; Described Ultrafine Grinding slag to be median size the be ground steel slag of 2 μm; Described sintered bauxite powder is median size is 40 μm, Al
2o
3content is greater than 90%, Fe
2o
3the sintered bauxite powder that content is less than 1%; Described sintered bauxite aggregate is Al
2o
3content is greater than 90%, and grain composition is: the sintered bauxite aggregate of particle diameter 0.16 ~ 0.25mm ︰ particle diameter 0.25 ~ 0.50mm ︰ particle diameter 0.5 ~ 1.0mm ︰ particle diameter 1.0 ~ 2.0mm=1 ︰ 1 ︰ 2 ︰ 3; Described high-performance water reducing agent to be water-reducing rate be 40% non-research work of air entrained type polycarboxylate water-reducer pulvis; Described high-strength steel fiber is diameter is 0.12mm, and length-to-diameter ratio is 50, and tensile strength is the straight copper plated steel fiber of 2800MPa.
Comparative example 1
Take each starting material: silicate cement: 50kg, silicon ash 12.5kg, silica powder: 20kg, sintered aluminium vanadine aggregate: 60kg, high-performance water reducing agent: 0.75kg, high-strength steel fiber: 10kg.Silicate cement, silicon ash, high-performance water reducing agent are sent into ball mill mix grinding 20 minutes, makes wear-resisting gelling material, draw off for subsequent use; The wear-resisting gelling material made all is sent into mixed model machine at a high speed, and add silica powder, sintered bauxite aggregate mix and blend 15 minutes, make wear-resisting dry blend, draw off for subsequent use; Again the wear-resisting dry blend made all is sent into stirrer, add 12kg water to stir, after being stirred to compound fluidisation, stir while slowly add high-strength steel fiber, until after all high-strength steel fiber is evenly distributed in compound, stops stirring, the compound mixed is poured in mould, after maintenance, make required product.
Described silicate cement is PII42.5 level silicate cement, C
3a content is 5.8%, C
4aF is 13%, and mixing material is granulated blast-furnace slag; Described silicon ash is greater than 20m for specific surface area
2/ g, SiO
2the condensation silicon ash that content is greater than 90%; Described silica powder is median size is 40 μm, SiO
2the levigate silica powder that content is greater than 95%; Described sintered bauxite aggregate is Al
2o
3content is greater than 90%, and grain composition is: the sintered bauxite aggregate of particle diameter 0.16 ~ 0.25mm ︰ particle diameter 0.25 ~ 0.50mm ︰ particle diameter 0.5 ~ 1.0mm ︰ particle diameter 1.0 ~ 2.0mm=1 ︰ 1 ︰ 2 ︰ 3; Described high-performance water reducing agent to be water-reducing rate be 40% non-research work of air entrained type polycarboxylate water-reducer pulvis; Described high-strength steel fiber is diameter is 0.12mm, and length-to-diameter ratio is 50, and tensile strength is the straight copper plated steel fiber of 2800MPa.
Embodiment 2
Take each starting material: silicate cement: 50kg, silicon ash 10kg, Ultrafine Grinding slag: 12.5kg, black silicon carbide powder: 15kg, black silicon carbide aggregate: 60kg, high-performance water reducing agent: 0.75kg, high-strength steel fiber: 10kg.Silicate cement, silicon ash, Ultrafine Grinding slag, high-performance water reducing agent are sent into ball mill mix grinding 20 minutes, makes wear-resisting gelling material, draw off for subsequent use; The wear-resisting gelling material made all is sent into mixed model machine at a high speed, and add black silicon carbide powder, black silicon carbide aggregate mix and blend 15 minutes, make wear-resisting dry blend, draw off for subsequent use; Again the wear-resisting dry blend made all is sent into stirrer, add 12kg water to stir, after being stirred to compound fluidisation, stir while slowly add high-strength steel fiber, until after all high-strength steel fiber is evenly distributed in compound, stops stirring, the compound mixed is poured in mould, after maintenance, make required product.
Described silicate cement is PII42.5 level silicate cement, C
3a content is 5.8%, C
4aF is 13%, and mixing material is granulated blast-furnace slag; Described silicon ash is greater than 20m for specific surface area
2/ g, SiO
2the condensation silicon ash that content is greater than 90%; Described Ultrafine Grinding slag to be median size the be ground steel slag of 2 μm; Described black silicon carbide powder is median size is 38 μm, and SiC content is greater than 98%, Fe
2o
3the black silicon carbide powder that content is less than 0.5%; Described black silicon carbide aggregate is that SiC content is greater than 98%, and grain composition is: the black silicon carbide aggregate of particle diameter 0.16 ~ 0.25mm ︰ particle diameter 0.25 ~ 0.50mm ︰ particle diameter 0.5 ~ 1.0mm ︰ particle diameter 1.0 ~ 2.0mm=1 ︰ 1 ︰ 2 ︰ 3; Described high-performance water reducing agent to be water-reducing rate be 40% non-research work of air entrained type polycarboxylate water-reducer pulvis; Described high-strength steel fiber is diameter is 0.12mm, and length-to-diameter ratio is 50, and tensile strength is the straight copper plated steel fiber of 2800MPa.
Comparative example 2
Take each starting material: silicate cement: 50kg, silicon ash 12.5kg, silica powder: 20kg, black silicon carbide aggregate: 60kg, high-performance water reducing agent: 0.75kg, high-strength steel fiber: 10kg.Silicate cement, silicon ash, high-performance water reducing agent are sent into ball mill mix grinding 20 minutes, makes wear-resisting gelling material, draw off for subsequent use; The wear-resisting gelling material made all is sent into mixed model machine at a high speed, and add silica powder, black silicon carbide aggregate mix and blend 15 minutes, make wear-resisting dry blend, draw off for subsequent use; Again the wear-resisting dry blend made all is sent into stirrer, add 12kg water to stir, after being stirred to compound fluidisation, stir while slowly add high-strength steel fiber, until after all high-strength steel fiber is evenly distributed in compound, stops stirring, the compound mixed is poured in mould, after maintenance, make required product.
Described silicate cement is PII42.5 level silicate cement, C
3a content is 5.8%, C
4aF is 13%, and mixing material is granulated blast-furnace slag; Described silicon ash is greater than 20m for specific surface area
2/ g, SiO
2the condensation silicon ash that content is greater than 90%; Described silica powder is median size is 40 μm, SiO
2the levigate silica powder that content is greater than 95%; Described black silicon carbide aggregate is that SiC content is greater than 98%, and grain composition is: the black silicon carbide aggregate of particle diameter 0.16 ~ 0.25mm ︰ particle diameter 0.25 ~ 0.50mm ︰ particle diameter 0.5 ~ 1.0mm ︰ particle diameter 1.0 ~ 2.0mm=1 ︰ 1 ︰ 2 ︰ 3; Described high-performance water reducing agent to be water-reducing rate be 40% non-research work of air entrained type polycarboxylate water-reducer pulvis; Described high-strength steel fiber is diameter is 0.12mm, and length-to-diameter ratio is 50, and tensile strength is the straight copper plated steel fiber of 2800MPa.
Embodiment 3
Take each starting material: silicate cement: 50kg, silicon ash 10kg, Ultrafine Grinding slag: 12.5kg, silicon nitride powder: 15kg, silicon nitride aggregate: 60kg, high-performance water reducing agent: 0.75kg, high-strength steel fiber: 10kg.Silicate cement, silicon ash, Ultrafine Grinding slag, high-performance water reducing agent are sent into ball mill mix grinding 20 minutes, makes wear-resisting gelling material, draw off for subsequent use; The wear-resisting gelling material made all is sent into mixed model machine at a high speed, and add silicon nitride powder, silicon nitride aggregate mix and blend 15 minutes, make wear-resisting dry blend, draw off for subsequent use; Again the wear-resisting dry blend made all is sent into stirrer, add 12kg water to stir, after being stirred to compound fluidisation, stir while slowly add high-strength steel fiber, until after all high-strength steel fiber is evenly distributed in compound, stops stirring, the compound mixed is poured in mould, after maintenance, make required product.
Described silicate cement is PII42.5 level silicate cement, C
3a content is 5.8%, C
4aF is 13%, and mixing material is granulated blast-furnace slag; Described silicon ash is greater than 20m for specific surface area
2/ g, SiO
2the condensation silicon ash that content is greater than 90%; Described Ultrafine Grinding slag to be median size the be ground steel slag of 2 μm; Described silicon nitride powder is median size is 38 μm, α-Si
3n
4the content silicon nitride powder that is greater than 93%; Described silicon nitride aggregate is α-Si
3n
4content be greater than 93%, grain composition is: the silicon nitride aggregate of particle diameter 0.16 ~ 0.25mm ︰ particle diameter 0.25 ~ 0.50mm ︰ particle diameter 0.5 ~ 1.0mm ︰ particle diameter 1.0 ~ 2.0mm=1 ︰ 1 ︰ 2 ︰ 3; Described high-performance water reducing agent to be water-reducing rate be 40% non-research work of air entrained type polycarboxylate water-reducer pulvis; Described high-strength steel fiber is diameter is 0.12mm, and length-to-diameter ratio is 50, and tensile strength is the straight copper plated steel fiber of 2800MPa.
Comparative example 3
Take each starting material: silicate cement: 50kg, silicon ash 12.5kg, silica powder: 20kg, silicon nitride aggregate: 60kg, high-performance water reducing agent: 0.75kg, high-strength steel fiber: 10kg.Silicate cement, silicon ash, high-performance water reducing agent are sent into ball mill mix grinding 20 minutes, makes wear-resisting gelling material, draw off for subsequent use; The wear-resisting gelling material made all is sent into mixed model machine at a high speed, and add silica powder, silicon nitride aggregate mix and blend 15 minutes, make wear-resisting dry blend, draw off for subsequent use; Again the wear-resisting dry blend made all is sent into stirrer, add 12kg water to stir, after being stirred to compound fluidisation, stir while slowly add high-strength steel fiber, until after all high-strength steel fiber is evenly distributed in compound, stops stirring, the compound mixed is poured in mould, after maintenance, make required product.
Described silicate cement is PII42.5 level silicate cement, C
3a content is 5.8%, C
4aF is 13%, and mixing material is granulated blast-furnace slag; Described silicon ash is greater than 20m for specific surface area
2/ g, SiO
2the condensation silicon ash that content is greater than 90%; Described silica powder is median size is 40 μm, SiO
2the levigate silica powder that content is greater than 95%; α-Si in described silicon nitride aggregate
3n
4content be greater than 93%, grain composition is: the silicon nitride aggregate of particle diameter 0.16 ~ 0.25mm ︰ particle diameter 0.25 ~ 0.50mm ︰ particle diameter 0.5 ~ 1.0mm ︰ particle diameter 1.0 ~ 2.0mm=1 ︰ 1 ︰ 2 ︰ 3; Described high-performance water reducing agent to be water-reducing rate be 40% non-research work of air entrained type polycarboxylate water-reducer pulvis; Described high-strength steel fiber is diameter is 0.12mm, and length-to-diameter ratio is 50, and tensile strength is the straight copper plated steel fiber of 2800MPa.
Each embodiment and comparative example material property summarized results are as following table:
Claims (9)
1. a high-strength high abrasion cement-based material, is characterized in that, its raw material composition comprises by weight:
Silicate cement 1 part, highly active mineral admixture 0.15 ~ 0.25 part, ultra-fine wear-resisting adulterant 0.2 ~ 0.3 part, wear-resisting powder 0.3 ~ 0.4 part, abrasive aggregates 1.0 ~ 1.5 parts, high-performance water reducing agent 0.01 ~ 0.02 part, steel fiber 0.15 ~ 0.25 part, 0.22 ~ 0.28 part, water;
Described highly active mineral admixture is silicon ash or burns metakaolin; Described ultra-fine wear-resisting adulterant to be median size the be ground steel slag of 1 ~ 3 μm; Described wear-resisting powder and abrasive aggregates are one or more mixing in sintered bauxite, black silicon carbide or silicon nitride, and the median size of wear-resisting powder is 30 ~ 45 μm, and the median size of abrasive aggregates is 0.16 ~ 2mm.
2. cement-based material as claimed in claim 1, it is characterized in that, described silicate cement is 42.5 grades and above silicate cement.
3. cement-based material as claimed in claim 1, it is characterized in that, described silicon ash is SiO
2content is greater than 90%, specific surface area is greater than 20m
2the condensation silicon ash of/g.
4. cement-based material as claimed in claim 1, is characterized in that, SiO in described burning metakaolin
2and Al
2o
3total content be no less than 92%, burning the median size of metakaolin is 1 ~ 3mm.
5. cement-based material as claimed in claim 1, is characterized in that, Al in described sintered aluminium vanadine
2o
3content is greater than 90%; In black silicon carbide, SiC content is greater than 98%; α-Si in silicon nitride
3n
4content be greater than 93%.
6. cement-based material as claimed in claim 1, it is characterized in that, in described abrasive aggregates, the mass ratio of different-grain diameter scope abrasive aggregates is (particle diameter 0.16 ~ 0.25mm) ︰ (particle diameter 0.25 ~ 0.50mm) ︰ (particle diameter 0.5 ~ 1.0mm) ︰ (particle diameter 1.0 ~ 2.0mm)=1 ︰ 1 ︰ 1 ︰ 4 or 1 ︰ 1 ︰ 2 ︰ 3.
7. cement-based material as claimed in claim 1, it is characterized in that, the diameter of described steel fiber is 0.12 ~ 0.2mm, and length-to-diameter ratio is 40 ~ 60, and tensile strength is not less than 2000MPa.
8. cement-based material as claimed in claim 1, it is characterized in that, described high-performance water reducing agent is the non-air-entraining water-reducing agent that water-reducing rate is greater than 35%.
9. a preparation method for high-strength high abrasion cement-based material, is characterized in that, comprise the following steps:
(1) take silicate cement 1 part by weight, highly active mineral admixture 0.15 ~ 0.25 part, ultra-fine wear-resisting adulterant 0.2 ~ 0.3 part, high-performance water reducing agent 0.01 ~ 0.02 part, send into ball mill mix grinding, make wear-resisting gelling material;
(2) take 1.36 ~ 1.58 parts of described wear-resisting gelling material by weight, wear-resisting powder 0.3 ~ 0.4 part, abrasive aggregates 1.0 ~ 1.5 parts, mix and blend, makes wear-resisting dry blend;
(3) 2.66 ~ 3.48 parts of described wear-resisting dry blends are taken by weight, send into stirrer, add 0.22 ~ 0.28 part of water to stir, after being stirred to compound fluidisation, stir while slowly add 0.15 ~ 0.25 part of steel fiber again, pour into after stirring in mould, after maintenance, namely obtain high-strength high abrasion cement-based material.
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| CN104692745A (en) | 2015-06-10 |
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